International Rescue attempt their most difficult mission ever while defending Tracy Island from a dangerous assault.

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Gordon travels in Thunderbird 4 to recover Braman but discovers that the Chaos Crew have gotten to the robot first. An underwater battle ensues and both Thunderbird 4 and Gordon are harmed.

International Rescue are dispatched to save one of their own when the Hood traps Lady Penelope and Parker inside an underwater hyper-train loop during a high-stakes robbery.

International Rescue attempt their most difficult mission ever while defending Tracy Island from a dangerous assault.

No description available

Through the use of archive footage, Brains informs the team of a discovery, but in order to gather more information, our heroes split into groups and search for an escape pod missing since Jeff Tracy's crash.

During a joint operation between International Rescue and the Global Defence Force, a series of mishaps nearly ends in disaster. In the wake of the botched mission, Colonel Martin Janus takes over the GDF...

A facility known as CATCH, from where all air traffic in North America is controlled is sabotaged and Scott and Virgil handle a rescue mission involving a mid-air plane collision while Kayo infiltrates the facility using Thunderbird Shadow. Kayo discovers that this is a diversion and part of a much bigger plan by the Hood. Disregarding Scott and John's instructions regarding International Rescue's mission to save people and not act as policemen she puts herself in danger and is saved by an unlikely source.

IR receives a distress call from the Calypso, a space vessel returning from a long mission. Scott and Virgil get aboard the plummeting ship and locate the disoriented crew along with an old robot named Braman, who sent the original distress call.

International Rescue scrambles all the flight-capable Thunderbirds to rescue the crew of CIR.R.U.S, a high-atmosphere weather station, now in danger due to the arrival of a fierce storm. TB1, TB2 and TB3 are quickly crippled by the conditions, and the only hope of salvaging the mission lies with TB5 - and John's ability to mount his most daring rescue ever.

In order to build a T-drive engine for the Zero-X, Brains needs help from the Mechanic. The trouble is, the Mechanic is locked inside a space prison known as the Hex.

A series of cascading equipment failures leads John to realise that rogue A.I. has gained control of Thunderbird 5. The programme is sending false monitor images to Tracy Island to deceive the other brothers. John finally gets through to Lady Penelope and informs her of the situation. Once the other brothers figure out what is going on, Alan is despatched in Thunderbird 3 to rescue John.

Concerns arise when a meteor shower is projected to hit the decommissioned Shadow Alpha One moon base, and attempts at contacting the lone crew member, Captain Lee Taylor, are unsuccessful. Scott and Alan take Thunderbird 3 on a rescue mission and Scott boards the base and finds Taylor attempting to maintain the base and it's defence system against meteors. After initial attempts to defend the base, against continuing waves of meteors, Scott and Taylor are forced to abandon the base to meet Thunderbird 3 at a rendezvous on the moon's surface that itself is threatened by the meteor shower. Guest Star: Rich Hall as Captain Lee Taylor.

Virgil attempts to rescue a mining crew trapped inside a glacier, but the scientist in charge of the project refuses to leave.

Kayo is riding aboard Fireflash, a supersonic airliner invented by Brains, but she is unaware that its controls have been tampered with. International Rescue notices the plane has vanished from their monitors and attempt to locate it. Kayo realises that the plane is flying in the wrong direction, and manages to avoid a powerful gas attack that has knocked out both passengers and crew.

A scientist accidentally locks herself inside a vault which is being used to store unstable matter. There is only one person who has successfully broken into a vault like this - Parker. Colonel Casey of the GDF recruits Parker for the job, but the safe cracker ends up locking himself and Lady Penelope inside as well. Virgil and Scott transport the vault to an isolated area on Thunderbird 2, where Parker and Penelope must try and free themselves and the scientist before the anti-matter explodes. Note: This episode is a homage to the original Thunderbirds episode, Vault of Death

The chase is on and Kayo and Alan work quickly to re-capture Thunderbird 3 from Havoc. Meanwhile, Scott's efforts to extract the escape pod run into additional complications.

Thunderbird 5 picks up an unusual radiation spike from a remote corner of Africa, and Scott rushes in with Thunderbird 1 to check it out. Using special equipment, Scott enters the mine and discovers the source to be a leak of unstable uranium. Moments later he is attacked by a mysterious woman who claims that the mine belongs to her family. During their confrontation, the mine begins to crumble - and Scott and she must find a way out.

Two Rescue Scouts get locked inside an antiquated crablogger vehicle in the middle of a forest fire. The Tracys respond, and assist both on land and in the sky to rescue the scouts and put out the fires.

A seismologist and his son alert the authorities to the presence of a rogue wildcat mining operation, only for the machinery to trigger an earthquake that swallows the equipment - along with the father and son. Gordon must attempt a daring underground rescue of the boy and his injured father, while Virgil has to find a way to shut down the out-of-control rig.

On Mars a landslide traps Captain Taylor and a scientist in a cavern. Alan and Virgil fly to the red planet and assist with the aid of Thunderbird 3 and a specialised Exo-Pod. However, circumstances in the cave lead Virgil to eject the air in his suit, leaving our heroes short on air inside a leaking cave.

When two scientists notice a huge section of coral reef bleaching from acidic waters, Gordon launches in Thunderbird 4 to discover the cause. Under the water, he finds a sunken cargo ship containing dangerous acidic materials.

As the team continue their quest to save the researched, Lady Penelope is on the trail of their adversary.

Halley's Comet is passing close to Earth. Businessman Francois Lemaire, on an ego trip sending live pictures back to earth, with his unimpressed wife Melanie on board his space yacht the Solar Wind. They fly into the comet's tail and the ship is damaged losing communications. John in Thunderbird 5 monitoring the situation despatches Thunderbird 3 with Alan and Scott to look for survivors. Alan is particularly excited to be going to Halley's comet.